1. Distribution of microfossil groups across the Wenlock shelf of the Welsh Basin;Aldridge,1981
2. The Wenlock Series in the Wenlock area;Bassett,1989
3. The type Wenlock Series;Bassett;Rep. Inst. Geol. Sci.,1975
4. Notes on the Lower Carboniferous rocks of the Wrekin district;Bracewell,1925
5. Spores from the Lower Carboniferous deposits at Burntisland, Fife, Scotland;Brindley;Pollen Spores,1986